/*
 * Copyright (C) 2009 M. Hautle.
 * 
 * This file is part of TrackedBean.
 * 
 * TrackedBean is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any later version.
 * 
 * TrackedBean is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License along with TrackedBean. If not, see <http://www.gnu.org/licenses/>.
 */
package ch.trackedbean.validator.defaultValidators;

import ch.trackedbean.validator.*;
import ch.trackedbean.validator.internal.*;

/**
 * Validator for {@link Range}.
 * 
 * @author M. Hautle
 */
public class RangeValidator extends AbstractValidator {
    /** The minimum value of the range */
    private double min;

    /** The maximum value of the range */
    private double max;

    /** If null is allowed. */
    private boolean allowNull;

    /**
     * {@inheritDoc}
     */
    @Override
    public void init(IPropertyValidatorConfiguration cfg) {
        min = cfg.getDouble(Range.ATTR_MIN, 0);
        max = cfg.getDouble(Range.ATTR_MAX, Double.MAX_VALUE);
        allowNull = cfg.getBoolean(Range.ATTR_ALLOW_NULL, false);
        final String messageKey = cfg.getString(Range.ATTR_MESSAGE, Range.DEFAULT_MESSAGE);
        error = new ErrorDescription(messageKey, new Double(min), new Double(max));
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected boolean isValid(Object value) {
        if (value == null && allowNull)
            return true;
        if (!(value instanceof Number))
            return false;
        final double number = ((Number) value).doubleValue();
        if (number >= min && number <= max)
            return true;
        return false;
    }
}
